[llvm] r335773 - [DAGCombine] Disable TokenFactor simplifications when optnone.

[Nirav Dave via llvm-commits]

Author: niravd
Date: Wed Jun 27 12:41:25 2018
New Revision: 335773

URL: http://llvm.org/viewvc/llvm-project?rev=335773&view=rev
Log:
[DAGCombine] Disable TokenFactor simplifications when optnone.

Modified:
    llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp

Modified: llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp?rev=335773&r1=335772&r2=335773&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp (original)
+++ llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp Wed Jun 27 12:41:25 2018
@@ -1692,6 +1692,10 @@ SDValue DAGCombiner::visitTokenFactor(SD
       return N->getOperand(1);
   }
 
+  // Don't simplify token factors if optnone.
+  if (OptLevel == CodeGenOpt::None)
+    return SDValue();
+
   SmallVector<SDNode *, 8> TFs;     // List of token factors to visit.
   SmallVector<SDValue, 8> Ops;      // Ops for replacing token factor.
   SmallPtrSet<SDNode*, 16> SeenOps;